Rockville DB Marine Series, Owner'S Manual

Page: 19 / 24

19
PROBLEM
Amp keeps blowing fuses
Amp gets very hot
Distribution Block Amp Fuse - If both sides of the main fuse have power, and one side of the distribution
block has power, but the other side of that fuse is dead, then you’re either dealing with a shorted power
wire or an internal amplifier fault. There are a few ways to determine which one is the culprit, depending on
how your amp is installed and where the wires are routed.
1. Check if you can see power wire that connects the distribution block to your amp. In an ideal situation,
you’ll be able to see the entire length of the wire. If that isn’t possible, then the next best thing is to just
disconnect the power wire from your amp, make sure that the loose end isn’t in contact with ground, and
check whether the fuse still blows. If it does, then the problem is in the power wire, and replacing it will
almost certainly fix your problem. Of course, you’ll have to take care when routing the new wire so that it
doesn’t end up shorting out as well. If the fuse doesn’t blow with the power wire disconnected from your
amp, then you have an internal amplifier problem.
Internal Amplifier Fuse - If the fuse blows when the amp is turned up, then you likely have subwoofers that
are either incompatible or that are wired at too low of an impedance. Rewire to achieve proper impedance
or replace the subwoofers with compatible ones. Check and make sure the power and ground wires did
not get crossed. Also, check and make sure your speaker wires are not crossed.
1. The main reason amps overheat is if the impedance they are running at is very low, or if the subwoofer
requires more power than the amp can give it. Also if the wiring can not give the proper current fast
enough it can cause the amp to get hot as well. Make sure the amp is running a the proper impedance or
use subwoofers that are compatible with the amp. Make sure the wiring s correct and you are using the
proper wires for your system.
2. A poor ground cable connection can cause your amp to get very hot. Check your ground connection
and make sure that the cable is securely tightened.
3. Check the location where your amp is mounted. Make usre it is in a spot where it will receive proper
ventilation.
CAUSE/SOLUTION